I replaced the harness on my 89 300E with one from a donor car. The new harness is in a lot better shape than mine was, especially the pin connectors in the CIS-E plug. Soldered the wires carefully but hit a snag. The black wire with the yellow stripe that comes from the EZL plug is somewhere up in the harness. I spliced the old one back in. There are two green/yellow stripe wires from the terminal on the EZL instead of the one in my old harness. I don't think that's a problem either. Problem is I have no tach or temp gauge. Engine started up and runs fine. ABS light is on but I'm sure that's the OVP doing that. Lambda cycles from 46 to 48% so that looks good. I have two additional small brown ground wires in the repl harness so I grounded them but still didn't make the instruments work.